title: Factor VIII: C and factor VIII R: Ag in Argentine hemorrhagic fever.
abstract: Factor VIII procoagulant activity (F VIII:C) and factor VIII related antigen (F VIII R: Ag) were investigated in 35 patients with Argentine hemorrhagic fever. Since the results obtained in the three clinical forms of the disease were not significantly different, they were tabulated altogether. F VIII:C was low in early stages of the disease but increased progressively in later days (days 5-6: 0.54 +/- 0.10 I. U/ml; days 13-14: 0.95 +/- 0.13 I.U./ml). In contrast, the levels of F VIII R: Ag were high all along the disease and they returned to normal values during the convalescence period (days 5-6; 2.58 +/- 0.54 I.U./ml; day 30: 1.30 +/- 0.14 I.U./ml). The levels of F VIII R: ag were similar in samples drawn before (11 cases) or after (10 cases) the treatment with immune plasma infusion. Plasma samples from 12 patients were studied by two-dimensional immunoelectrophoresis. The only abnormality found was increased height of the immune precipitation arc.
mesh_terms: D000941:Antigens / Q000032:analysis*; D005169:Factor VIII / Q000032:analysis* / Q000276:immunology*; D006478:Hemorrhagic Fever, American / Q000097:blood* / Q000175:diagnosis / Q000628:therapy; D006801:Humans; D007116:Immunization, Passive; D007123:Immunoelectrophoresis, Two-Dimensional; D014841:von Willebrand Factor
chemical_list: D000941:Antigens; D014841:von Willebrand Factor; D005169:Factor VIII